2011年日本本州东海岸附近9.0级地震活动特征
摘要
分析了2011年3月11日日本本州东海岸附近9.0级地震序列的时空演化特征及该次地震前日本海沟附近地震活动特点:①本次特大地震为前震-主震-余震型,前震序列具有空间分布集中、低b值、震源机制一致的特点;②主震后0.5h先后发生最大余震7.9级和次大余震7.7级,其后强度迅速衰减,主震后半个月和1个月左右余震出现起伏增强活动.本次地震为双侧破裂,主震后5h,余震区展布在长500km、宽300km范围内;3月12日后余震区长轴略有扩展,约600km;③9.0级地震震前9a,震源区附近出现了中强以上地震的显著增强活动,增强区范围大体与余震区相当.
引文
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2吴开统.地震序列的基本类型及其在地震预报中的应用.地震战线,1971,7:45–51
3吴开统,岳明生,武宦英,等.海城地震序列的特征.地球物理学报,1976,19:95–109
4陈顒.用震源机制一致性作为描述地震活动性的新参数.地球物理学报,1978,21:140–159
5Chen Y,Liu J,Ge H K.Pattern characteristics of foreshock sequences.Pure Appl Geophys,1999,155:395–408
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7Suyehiro S,Asada T,Ohtake M.Foreshocks and aftershocks accompanying a perceptible earthquake in central Japan—On a peculiar na-ture of foreshocks.Pap Meteorol Geophys,1964,15:71–88
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9蒋海昆,傅征祥,刘杰,等.中国大陆地震序列.北京:地震出版社,2007.1–175
10Fedobov A V.Regularities of the distribution of strong earthuqaks in Kanchatka,the Kuri Island and northeast Japan(in Russian).Tr Inst Fiz Zemli,Acad Nauk SSSR,1965,36:66–93
11Mogi K.Two kinds of seismic gaps.Pure Appl Geophys,1979,117:1172–1186
12梅世蓉,宋志平,薛艳.中国巨大地震前地震活动环形分布图像与规律.地震学报,1996,18:413–419
13Engdahl E R,Villaseor A.Global seismicity:1900–1999.In:Lee W H K,Kanamori H,Jennings P C,et al,eds.International Handbook of Earthquake and Engineering Seismology.San Diego:Academic Press,2002.665–690
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16Gutenberg B,Richter C F.Frequency of earthquakes in California.Bull Seism Soc Amer,1944,34:185–188
17Suyehiro S.Difference between aftershocks and foreshocks in the relationship of magnitude to frequency of occurrence for the great Chilean earthquake of1960.Bull Seism Soc Amer,1966,56:185–200
18Omori F.On after-shocks(in Japanese).Rep Imp Earthq Inv Com,1894,2:103–138
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20刘正荣.根据地震频度率减预报地震的工作细则.地震,1984,1:32–37
21Main I G.Earthquakes as critical pheomena:Implications for probabilitic seismic hazard analysis.Bull Seism Soc Amer,1995,85:1299–1308
22Sornette D,Sammis C G.Critical exponents from renomalization group theory of earthquakes:Implications for earthquake prediction.J Phys I,1995,5:607–619
23Bufe C G,Varnes D J.Predictive modeling of the seismic cycle of the Greater San Francisco bay Region.J Geophys Res,1993,98:9872–9883
24Gutenberg B,Richter C F.Earthquake magnitude,intensity,energy and acceleration.Bull Seism Soc Am,1956,46:105–145
25Chen Y,Li L,Li J,et al.Wenchuan earthquake:Way of thinking is changed.Episodes,2008,31:374–377
2吴开统.地震序列的基本类型及其在地震预报中的应用.地震战线,1971,7:45–51
3吴开统,岳明生,武宦英,等.海城地震序列的特征.地球物理学报,1976,19:95–109
4陈顒.用震源机制一致性作为描述地震活动性的新参数.地球物理学报,1978,21:140–159
5Chen Y,Liu J,Ge H K.Pattern characteristics of foreshock sequences.Pure Appl Geophys,1999,155:395–408
6倪四道,王伟涛,李丽.2010年4月14日玉树地震:一个有前震的破坏性地震.中国科学:地球科学,2010,40:535–537
7Suyehiro S,Asada T,Ohtake M.Foreshocks and aftershocks accompanying a perceptible earthquake in central Japan—On a peculiar na-ture of foreshocks.Pap Meteorol Geophys,1964,15:71–88
8Umino N,Okada T,Hasegawa A.Foreshock and aftershock sequence of the1998M5.0Sendai,northeastern Japan,earthquake and its implications for earthquake nucleation.Bull Seism Soc Amer,2002,92:2465–2477
9蒋海昆,傅征祥,刘杰,等.中国大陆地震序列.北京:地震出版社,2007.1–175
10Fedobov A V.Regularities of the distribution of strong earthuqaks in Kanchatka,the Kuri Island and northeast Japan(in Russian).Tr Inst Fiz Zemli,Acad Nauk SSSR,1965,36:66–93
11Mogi K.Two kinds of seismic gaps.Pure Appl Geophys,1979,117:1172–1186
12梅世蓉,宋志平,薛艳.中国巨大地震前地震活动环形分布图像与规律.地震学报,1996,18:413–419
13Engdahl E R,Villaseor A.Global seismicity:1900–1999.In:Lee W H K,Kanamori H,Jennings P C,et al,eds.International Handbook of Earthquake and Engineering Seismology.San Diego:Academic Press,2002.665–690
14Scholz C H.Mechanics of Earthquakes and Faulting.Cambridge:Cambridge University Press,2002
15Scholz C H.Mechanisms of seismic quiescences.Pure Appl Geophys,1988,126:701–718
16Gutenberg B,Richter C F.Frequency of earthquakes in California.Bull Seism Soc Amer,1944,34:185–188
17Suyehiro S.Difference between aftershocks and foreshocks in the relationship of magnitude to frequency of occurrence for the great Chilean earthquake of1960.Bull Seism Soc Amer,1966,56:185–200
18Omori F.On after-shocks(in Japanese).Rep Imp Earthq Inv Com,1894,2:103–138
19Omori F.On after-shocks of earthquakes.J Coll Sci Imp Univ Tokyo,1894,7:111–200
20刘正荣.根据地震频度率减预报地震的工作细则.地震,1984,1:32–37
21Main I G.Earthquakes as critical pheomena:Implications for probabilitic seismic hazard analysis.Bull Seism Soc Amer,1995,85:1299–1308
22Sornette D,Sammis C G.Critical exponents from renomalization group theory of earthquakes:Implications for earthquake prediction.J Phys I,1995,5:607–619
23Bufe C G,Varnes D J.Predictive modeling of the seismic cycle of the Greater San Francisco bay Region.J Geophys Res,1993,98:9872–9883
24Gutenberg B,Richter C F.Earthquake magnitude,intensity,energy and acceleration.Bull Seism Soc Am,1956,46:105–145
25Chen Y,Li L,Li J,et al.Wenchuan earthquake:Way of thinking is changed.Episodes,2008,31:374–377
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